Linux Useful One Liner Commands Instructor Guide

By: Kevin O'Neill

Narrated by: Virtual Voice

Linux is utilized within the world of information technology in a very broad manner. Therefore, the items presented here are useful one liner commands that encompass real world scenarios that are applicable to a system administrator, power user and an end user or student looking to further their knowledge in this area.
The guide is meant to be utilized by an individual whom will be reviewing via demonstration format these useful one liner commands.

Table of Contents:

Display and List One-Liners
List Hidden Files And Directories First:
Displays Build of Distribution:
Display Disk Usage in Human Readable Format:
Display Only The Total Disk Usage (Summary) Of Current Directory:
Display Day Of The Year:
Display Lines From Head And Tail:
Press A Key To Continue:
Shows Size Of Files And Directories Sorted:
Count Files In Current Directory:
Monitoring And Using One-Liners
Most Used Commands:
Monitor CPU Speed:
View All Network Activity In Real Time:
View The TCP Connection Status By Group:
Monitoring Kernel Messages:
Total Disk Space Used In Current Directory And Root Directory:
Process Tree With Details:
Check CPU Architecture:
Services And Processes Related One-Liners
Get Running Services By Port Number:
Processes Per User Count:
File Related One-Liners
Find And Delete Specific Type Of Files:
Find All Files And Paths That Do Not Have .txt:
Find Latest Version Of Given File:
Find Files That Contain test, hello and txt:
Find Open Files:
Test Text Writing With Delay:
Vertical Text Display:
Create Sequence Of Numbers 1 To 15 In Perl:
Display Today’s Date:
Octal Dump Of A File:
Run Multiple Commands Against A File:
Match Characters In A String And Return The Matches In Groups Of Two Characters:
Match 10 Characters In A String:
Match Characters Between Brackets:
Search C File And Output Printf Statement:
Search C File And Output Printf And Return Statements:
Match String In C File That Starts With The (" and Ends With the "):